This circuit was found in Motorola documentation from 1968. SCRs can be modern equivalents and the maximum load is 5 A at 40 V.
This circuit warms a light bulb slightly so that the wind through it alters the filament...
Suitable for 12.6 V voltages at the output and currents of 2 A, this circuit was found in a 1965...
An OR gate can be implemented with an LM3900 transconductance operational amplifier. The circuit is...